<template>
  <el-dialog
    width="500px"
    title="员工导入"
    :visible="showExcelDialog"
    @close="closeDialog"
  >
    <el-row type="flex" justify="center">
      <div class="upload-excel">
        <input
          ref="excel-upload-input"
          class="excel-upload-input"
          type="file"
          accept=".xlsx, .xls"
          @change="onChange"
        >
        <div class="drop">
          <i class="el-icon-upload" />
          <el-button type="text" @click="downloadTemplate">下载导入模板</el-button>
          <span>将文件拖到此处或
            <el-button type="text" @click="handleUpload">点击上传</el-button>
          </span>
        </div>
      </div>
    </el-row>
    <el-row type="flex" justify="end">
      <!-- update:props属性名，值 直接修改 .sync修饰符的属性值 -->
      <el-button size="mini" type="primary" @click="$emit('update:showExcelDialog', false)">取消</el-button>
    </el-row>
  </el-dialog>
</template>
<script>

export default {
  props: {
    showExcelDialog: {
      type: Boolean,
      default: false
    }
  },
  methods: {
    // 关闭对话框
    closeDialog() {
      this.$emit('update:showExcelDialog', false)
    },
    // 导入模板(通知父组件下载模板)
    downloadTemplate() {
      this.$emit('downloadTemplate')
    },
    // 点击上传文件按钮
    handleUpload() {
      // 调用input的上传文件按钮事件（相当于点击了文件上传按钮）
      this.$refs['excel-upload-input'].click()
    },
    // 监听上传文件input的change事件：通知父组件调用api上传文件
    async onChange(event) {
      // 将上传的File数组传给父组件，
      // emit方法不会等到父组件执行完uploadExcel方法才往下执行，可以看成异步方法
      this.$emit('uploadExcel', event.target.files)
      // 清空表单
      this.$refs['excel-upload-input'].value = ''
    }
  }
}
</script>

<style scoped lang="scss">
    .upload-excel {
    display: flex;
    justify-content: center;
    margin: 20px;
    width: 360px;
    height: 180px;
    align-items: center;
    color: #697086;
    .excel-upload-input {
        display: none;
        z-index: -9999;
    }
    .btn-upload,
    .drop {
        border: 1px dashed #dcdfe6;
        width: 100%;
        height: 100%;
        text-align: center;
        line-height: 160px;
        border-radius: 8px;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
    .drop {
        line-height: 40px;
        color: #bbb;
        i {
        font-size: 60px;
        display: block;
        color: #c0c4cc;
        }
    }
    }
</style>
